Is there anything that will remove the black marks on the alumnium inside walls? It has been acid washed on the outside and looks good but there are marks on the inside in the rear tack and under the mangers that i can't use the pressure washer for...its purely cosmetic but I am a neat freak and want it clean.

I am thinking something that i can use and apply myself  with some elbow grease:) LOL as a side note i DID try the magic eraser...to no avail  :)

I used Crown, works well too.

http://www.crownspraypower.com/RV_Boat_Cleaner_4_Gallon_Pack_p/rv-1gal-4.htm

I just bought Crown, used your link, Thanks. Will let you all know how it works.

I have a custom Featherlite with FRP panel sides, so need something that will clean fiberglass as well as aluminum and this product says it will. We will see..

Thanks for the link...